Kuwait, located in the Middle East, has the 2nd largest stock exchange in the Arab world. The country has the 5th largest oil reserves in the world, anticipated to be 10% of the world's reserves. It is a small and rich nation with comparatively open economy. Kuwait is a tax-free nation and 80% of government revenues are generated through the oil industry. It is stated in the constitution of the country that all the country's natural resources and related revenues are the property of government. Main industries include: petroleum, petrochemicals, cement, shipbuilding and repair, construction materials, desalination and food processing.